Neonatal

Baby redirects here; for other meanings see Baby (disambiguation). A human infant Infant is a slightly more formal term for the word baby, the youngest category of child. The term "infant" derives from the Latin word in-fans, meaning "unable to speak." "Infant" is also a legal term with the (quite different) meaning of minor; that is, any child under the age of legal adulthood. A human infant less than a month old is a newborn infant or a neonate[1]. The term "newborn" includes pre ...